假设征服一条龙的战利品表示为这样的字符串列表:
dragonLoot = ['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby']
写一个名为 addToInventory(inventory, addedItems)的函数, 其中 inventory 参数是一个字典, 表示玩家的物品清单(像前面项目一样), addedItems参数是一个列表,就像 dragonLoot。
addToInventory()函数应该返回一个字典, 表示更新过的物品清单。请注意, 列表可以包含多个同样的项。你的代码看起来可能像这样:
def addToInventory(inventory, addedItems):
# your code goes here
inv = {'gold coin': 42, 'rope': 1}
dragonLoot = ['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby']
inv = addToInventory(inv, dragonLoot)
displayInventory(inv)
前面的程序(加上前一个项目中的 displayInventory()函数) 将输出如下:
Inventory:
45 gold coin
1 rope
1 ruby
1 dagger
Total number of items: 48
示例代码:
def add_inventory(inventory, added_items): for k in added_items: inventory.setdefault(k, 0) inventory[k] = inventory[k]+1 return inventory def display_inventory(inventory): print('Inventory:') item_total = 0 for k, v in inventory.items(): print(str(v)+' '+k) item_total += v print('Total number of items:'+str(item_total)) inv = {'gold coin': 42, 'rope': 1} dragon_loot = ['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby'] inv = add_inventory(inv, dragon_loot) display_inventory(inv)